Utensils — Bulugh al-Maram 21

Narrated (rad):I said “O Allah’s Messenger! We are living in a land inhabited by the people of the Scriptures; can we take our meals in their utensils?” He said, “If you can get utensils other than theirs, do not eat in theirs, but if you cannot get other than theirs, wash them and eat in them” [Agreed upon].